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7/3-(2*x)-7 = 7/35-((21/8)*x) // - 7/35-((21/8)*x)
(21/8)*x-(2*x)+7/3-(7/35)-7 = 0
(21/8)*x-2*x+7/3-1/5-7 = 0
5/8*x-73/15 = 0 // + 73/15
5/8*x = 73/15 // : 5/8
x = 73/15/5/8
x = 584/75
x = 584/75
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